arXiv:nucl-th/0211085·v1·Nuclear Theory
Medium effects to the N(1535) resonance and eta mesic nuclei
D. Jido (1) · H. Nagahiro (2) · S. Hirenzaki (2) ((1) RCNP · Osaka Univ. · (2) Nara women's Univ.)
Abstract
The structure of eta-nucleus bound systems (eta mesic nuclei) is investigated as one of the tools to study in-medium properties of the N(1535) (N*) resonance. We show that, as a general consequence, the eta-nucleus potential has a repulsive core at the nuclear center with an attractive part at the nuclear surface, if sufficient reduction of the mass difference of N and N* stems from the in-medium effects to N*. The (d,3He) spectra are evaluated for the formation of these bound states to investigate the experimental feasibility.
Comments: LaTeX, 4 pages, 2 figures. To appear in Proceedings of PANIC02, XVI International Conference on Particles and Nuclei, Osaka, Japan, September 30 - October 4, 2002